1. Noninvasive Nasal Mask Ventilation for Acute Respiratory Failure
Bernard E. Pennock, Ph.D., Linda Crawshaw, R.N., B.S.N., Peter D. Kaplan, M.D., F.C.C.P 
CHEST 
Volume 105, Issue 2, Pages (February 1994)
DOI: /chest
Copyright © 1994 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Percentage of patients vs type of respiratory failure. A indicates pure hypoxemia respiratory failure, and E indicates pure hypercapnic respiratory failure; B, C, and D indicate mixed failure, intermittent weighting between A and E. The clear bar represents patients in special care, phase 1, and the solid bar indicates patients in the transition phase 2.
CHEST  , DOI: ( /chest )
Copyright © 1994 The American College of Chest Physicians Terms and Conditions